FBT MDA 4125 — 4-Channel Class D DSP Install Amplifier
MDA 4125 Overview
The FBT MDA 4125 is a compact, energy-efficient 4-channel Class D amplifier designed for low-to-medium power fixed installations. Operating in LO-Z mode, it delivers 4 channels x 125W at 4Ω, and in HI-Z mode it consolidates to 2 channels x 250W at 100V for distributed audio systems. Its 1U half-rack form factor makes it well-suited for rack-dense installs in commercial venues, houses of worship, corporate AV, and hospitality environments. System integrators and install engineers will benefit from its browser-accessible DSP, preloaded FBT speaker presets, and Power Sharing mode for flexible channel configuration.
The MDA 4125 integrates WiFi for wireless network access, S/PDIF I/O for digital signal routing, and GPIO for external system control, streamlining both commissioning and ongoing system management.
Key Features
- Class D Amplification — energy-efficient topology in a compact 1U half-rack chassis, minimizing rack space and power consumption in install environments
- LO-Z Mode — delivers 4 channels x 125W at 4Ω for direct-drive loudspeaker applications
- HI-Z Mode — reconfigures to 2 channels x 250W at 100V for distributed 70V/100V constant-voltage systems
- Power Sharing Mode — allows dynamic power distribution across channels to optimize amplifier headroom based on system demand
- Built-in DSP with Browser Control — onboard digital signal processing accessible via a standard web browser, eliminating the need for proprietary software on the control device
- Integrated WiFi — enables wireless network connectivity for DSP access and system control without requiring a wired network connection at the amplifier
- S/PDIF I/O — digital audio input and output for integration into digital signal chains
- GPIO — general-purpose input/output for external control triggers, logic integration, and automation within installed systems
- Preloaded FBT Speaker Presets — factory DSP presets optimized for FBT loudspeakers simplify system tuning and reduce commissioning time
Connectivity & I/O
- S/PDIF digital audio input
- S/PDIF digital audio output
- GPIO (general-purpose input/output)
- Integrated WiFi network interface
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